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People have wondered for a long time how their personalities and behaviors are formed.It i

s not easy to explain why one person is intelligent and another is not, or why one is cooperative and another is competitive.

Social scientists are, of course, extremely interested in these types of questions. They want to explain why we possess certain characteristics and exhibit certain behaviors. There are no clear answers yet, but two distinct schools of thought on the matter have been developed.As one might expect, the two approaches are very different from one another, and there is a great deal of debate between proponents of each theory. The controversy is often referred to as nature/nurture .

Those who support the "nature" side of the conflict believe that our personalities and behavior. patter, ns are largely determined by biological and genetic factors. That our environment has little, if anything, to do with our abilities, characteristics, and behavior. is central to this theory. Taken to an extreme, this theory maintains that our behavior. is predetermined to such a degree that we are almost completely governed by our instincts.

Proponents of the "nurture" theory, or, as they are often called, behaviorists claimed that our environment is more important than our biologically based instincts in determining how we will act. A behaviorist, B.F. Skinner, sees humans as beings whose behavior. is almost completely shaped by their surroundings. The behaviorists' view of the human being is quite mechanistic; they maintain that, like machines, humans respond to environmental stimuli as the basis of the behavior.

Neither of these theories can yet fully explain human behavior. In fact, it is quite likely that the key to our behavior. lies somewhere between these two extremes. That the controversy will continue for a long time is certain.

According to the passage, people have wondered for a long time

A.why one is different from another

B.how one has certain personalities and behaviors

C.why one is more intelligent than another

D.why one is cooperative and another is competitive

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第1题

承受重复应力或交变应力的零件,在工作过程中,往往在工作应力低于其屈服点σs的情况下发生断裂,这种断裂称为()

A.脆性断裂

B.疲劳断裂

C.拉伸断裂

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第2题

承受重复应力或交变应力的零件,在工作过程中,往往在工作应力低于其屈服点σs的情况下发生断裂,这种断裂称为()

A.脆性断裂

B.疲劳断裂

C.拉伸断裂

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第3题

船机零件在交变应力长期作用下产生()。

A.韧性断裂

B. 脆性断裂

C. 疲劳断裂

D. 疲劳破坏

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第4题

船机零件在交变应力长期作用下产生()

A.韧性断裂

B.脆性断裂

C.疲劳断裂

D.疲劳破坏

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第5题

在变应力作用下,零件的失效形式主要是疲劳断裂。()
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第6题

零件疲劳断裂的特性之一是断裂应力小于材料的______。

A.σb

B.σs

C.σ-1

D.σp

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第7题

构件在交变应力作用下发生疲劳破坏,以下特点中______是正确的。A.断裂时的最大应力大于材料在静载

构件在交变应力作用下发生疲劳破坏,以下特点中______是正确的。

A.断裂时的最大应力大于材料在静载荷时的极限应力

B.用塑性材料制成的构件,断裂时也无明显的塑性变形,破坏时呈脆性断裂

C.疲劳破坏没有较长的过程,构件经过一次应力循环后突然断裂

D.断口表面呈粗糙样

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